I like nightcore, actually, and while it is usually worse than the original it isn't always. Maybe it's because most of the stuff you see labeled as nightcore isn't actually nightcore. The definition of nightcore is pretty specific and widely misunderstood, it applies only to remixes of specific genres of electronic music (hands-up, hardcore, ect.) that tend to fit well with the faster, higher pitch theme.
I still hear your voice when you sleep next to me
I still feel your touch in my dreams
Forgive me my weakness, but I don't know why
Without you it's hard to survive
'Cause every time we touch, I get this feeling
And every time we kiss I swear I could fly
Can't you feel my heart beat fast,
I want this to last
Need you by my side
'Cause every time we touch, I feel the static
And every time we kiss I reach for the sky
Can't you hear my heart beat so
I can't let you go
Want you in my life
Your arms are my castle
Your heart is my sky
They wipe away tears that I cry
The good and the bad times
We've been through them all
You make me rise when I fall
Well, no wonder it's easy. You're playing PHOENIX mode. That makes the game a complete joke, the real challenge is not letting any if your units die. True Fire Emblem fans play classic mode.
I bet you're not even playing hard mode too.
Chapter 10 is the first stepping stone that defines the difficulty of Conquest, so certain chapters afterwards will get harder. But I agree with SM, playing in Phoenix Mode negates any sort of challenge from the game. If you are worried about losing characters then I suggest casual mode instead. But try classic if you want pain. ;-;